Patents by Inventor Robert M. Mermal

Robert M. Mermal has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for use in harvesting earthworms
    Patent number: 4178711
    Abstract: A method for causing earthworms to come out of the ground so that they can be readily harvested, functional when applied to an area of ground to cause the earthworms in the soil to come out of the soil so that they can be harvested.
    Type: Grant
    Filed: December 22, 1977
    Date of Patent: December 18, 1979
    Inventors: Howard J. Mermal, Gary A. Mermal, Donald J. Mermal, Robert M. Mermal